How to export csv of variables for each object loop - powershell

Question

I have been stuck on trying to export in the format needed for this script for a month now. I can't figure out how to get it to export these variables in two separate loops into a single .csv file. We are given a .csv that contains staging_input and staging_location fields that both contain file locations on the network. We need to compare these two to make sure they are the same file count and size. I created a ForEach-Object loop for each of these fields and this gives me the desired output but I am unable to export-csv at the end of each loop into a single .csv.
Desired final output
Current output
#User input CSV File and Workorder
$workorder = Read-Host -Prompt 'Please enter the Fq job code'
$pos = $workorder.IndexOf("_")
$Client = $workorder.Substring(0, $pos)
$Matter = $workorder.Substring(6, $pos)
$job = $workorder.Substring($pos+7)
$csvoutputpath = "\\ldthost.pvt\client\" + $Client + "\" + $Matter + "\Proc\WKP\" + $job
$outputfilename = $workorder + ".csv"
$csvinputpath = Read-Host -Prompt 'Please Input the directory of the CSV file containing Staging input and Staging location'
$staginginput = Import-Csv $csvinputpath | select -ExpandProperty staging_input
$staginginputpath = $staginginput.TrimStart("\")
#Get Child Item for each line
$staginginputpath | ForEach-Object{
# In here, we do whatever want to the 'cell' that's currently in the pipeline
# Get File Counts
$staginginputcount = (Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$_ | Measure-Object).Count
#Get size
$staginginputsize = Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$_ | Measure-Object -property length -sum
$staginginputsize = $staginginputsize.sum / 1KB
}
$staginglocation = Import-Csv $csvinputpath | select -ExpandProperty staging_location
$staginglocationpath = $staginglocation.TrimStart("\")
#Get Child Item for each line
$staginglocationpath | ForEach-Object{
# In here, we do whatever want to the 'cell' that's currently in the pipeline
# Get File Counts
$staginglocationcount = (Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$_ | Measure-Object).Count
#Get size
$staginglocationsize = Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$_ | Measure-Object -property length -sum
$staginglocationsize = $staginglocationsize.sum / 1KB
}
##Export Final Output
$data = #()
$row = New-Object PSObject
$row | Add-Member -MemberType NoteProperty -Name "staging_input" -Value $staginginput
$row | Add-Member -MemberType NoteProperty -Name "staging_location" -Value $staginglocation
$row | Add-Member -MemberType NoteProperty -Name "staging_input_File_Count" -Value $staginginputcount
$row | Add-Member -MemberType NoteProperty -Name "staging_location_File_Count" -Value $staginglocationcount
$row | Add-Member -MemberType NoteProperty -Name "staging_input_File_Size" -Value $staginginputsize
$row | Add-Member -MemberType NoteProperty -Name "staging_location_File_Size" -Value $staginglocationsize
$data += $row
$Finaloutput = $csvoutputpath + "\" + $outputfilename
$data | Export-Csv $Finaloutput -NoTypeInformation -Append

Answer 1

Use a single loop instead of two:
#User input CSV File and Workorder
$workorder = Read-Host -Prompt 'Please enter the Fq job code'
$pos = $workorder.IndexOf("_")
$Client = $workorder.Substring(0, $pos)
$Matter = $workorder.Substring(6, $pos)
$job = $workorder.Substring($pos + 7)
$csvoutputpath = "\\ldthost.pvt\client\" + $Client + "\" + $Matter + "\Proc\WKP\" + $job
$outputfilename = $workorder + ".csv"
$csvinputpath = Read-Host -Prompt 'Please Input the directory of the CSV file containing Staging input and Staging location'
$Finaloutput = $csvoutputpath + "\" + $outputfilename
Import-Csv $csvinputpath |ForEach-Object {
# Calculate derived property values from `staging_input`
$staginginputpath = $_.staging_input.TrimStart("\")
$staginginputcount = (Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$staginginputpath | Measure-Object).Count
$staginginputsize = Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$staginginputpath | Measure-Object -property length -sum
$staginginputsize = $staginginputsize.sum / 1KB
# Calculate derived property values from `staging_location`
$staginglocationpath = $_.staging_location.TrimStart("\")
$staginglocationcount = (Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$staginglocationpath | Measure-Object).Count
$staginglocationsize = Get-ChildItem -Recurse -File -Force -LiteralPath \\?\UNC\$staginglocationpath | Measure-Object -property length -sum
$staginglocationsize = $staginglocationsize.sum / 1KB
# output new object with the property values calculated above
[pscustomobject]#{
staging_input = $_.staging_input
staging_location = $_.staging_location
staging_input_File_Count = $staginginputcount
staging_location_File_Count = $staginglocationcount
staging_input_File_Size = $staginginputsize
staging_location_File_Size = $staginglocationsize
}
} | Export-Csv $Finaloutput -NoTypeInformation